Hi! We have purchase a ShareCenter located in Office A. We have users in Office B whom want to edit the files in the ShareCenter via Public IP. I have assign the NAS with a Public IP and at my router I have opened the port 445. Unfortunately, I am unable to map the drive when I am in Office B where am prompted with error. When I telnet into the NAS public IP with port number 445, there is no response. But in the Local Lan in office A, when I telnet the ShareCenter local IP at port number 445, am able to get it. What I want to achieve is able to map the files from office B and edit the documents directly instead of using FTP. Hope that you can revert back to me urgently and thanks in advance.